Everything you need to know about platelets, why they're so important, and what you can expect if you donate them. Platelets explained in two minutes. Webdonors can give single, double, or triple units of platelets depending on their overall body mass and platelet count. Webdonor services laboratory is a comprehensive, highly accredited clinical reference laboratory serving the human transplantation and biomedical industries. Webwe offer testing services not only for donors and collected blood but also for patients who require transfusion or transplantation services. Our dedicated patient testing is tailored.